Intestines have many folds on their surface, and this increase in surface area makes absorption of nutrients faster and more efficient. This is an example of __________.
Fill in the blank(s) with the appropriate word(s).
the principle of complementarity of structure and function.
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X, Y, and Z are adjacent sensory receptors in the skin. During administration of the flu shot, a needle is inserted in the middle of Y's receptive field. All three receptors are activated. Which of the following is likely to be true?
A. The receptor potential in neurons X and Z will be more depolarized than in neuron Y. B. It won't be possible to discriminate which neuron's receptive field was stimulated at its center. C. The frequency of action potentials in the afferent pathway from neuron Y will be increased by excitatory interneurons projecting from the afferent pathways from neurons X and Z. D. The receptor potentials in all three neurons will achieve the same, average value. E. The frequency of action potentials in neuron Y will be greater than that in neurons X and Z.
Clusters of gray matter that contain neuron cell bodies and lie within masses of white matter are the
A. cortex. B. cerebral ganglia. C. cerebral nuclei. D. cerebral peduncles. E. ventricles.
What is the correct order for the cranial meninges, from superficial to deep?
a: Dura mater b: Pia mater c: Arachnoid mater A. a, b, c B. a, c, b C. b, a, c D. b, c, a E. c, b, a
The uterine tubes are covered and suspended by a superior portion of the broad ligament called the ________.
Fill in the blank(s) with the appropriate word(s).